Means for dynamically balancing cylinders



R. B. JENKINS MEANS FOR DYNAMICALLY BALANCING CYLINDERS oct. 9, l1945.v

Filed Dec. .21, 1943.

2 Sheets-Sheet ses lmventor Gttorneg Oct, 9, 1945. R. B. JENKINS2,385,470

` I MEANS FOR DYNAMICALLY BALANCING CYLNDERS A Filed nec. 21, 1945 l2sneets-shet 2 Patented` Oct. 9, 1945 UNITEDV STATES PATENT" FFICI'SY n s2,336,470"Y 'I MEANS FOR'DYNAMCALLYBALANCING Y. jgscnINnERsj y Robertjenkins, Gastonia, N.MC.` A' l 'Applieati December 21, isiaser'l No.515,116

2 Claims.

`such as sections ofthe cylinder vfora spinning and twisting frame,spoolers, quillers, and the f Y This invention .relates to: an apparatusforr dynamically balancing elongated cylindrical objects like wherestaticI balancing has not been found 5 elongated dimensions of thesections of cylinders. In a spinning frame, twisting frame, spooler,

feet in length, They usually havesuitable spindles oneach side of theframewith alongitudiy"nally disposed vcylinder extending between thevspindles from end to end and onto whichv b elt or tapes are disposed,which `belts are also disposed on kthe whcrls of the spindlesforimparting rotation to the same. vThese cylindersl in theabove-mentioned textile .machines areusualto be practical on account ofthe longitudinal or f ly made up in sections; a forty foot cylinder,

"probably being rmade up in sections of from live 'to nfteen feet inlength. These seetiensef cy1- e inders have ilanges at each end andhavela head member counter-shrunk therein, vso that l stub shafts can bedisposed between the abutting ends of the cylinders 'and .by means `of avSpanner wrench passed through a holein thecylinders, the stub shaftscan beV secured inrposition to rhold the cylinder as an entire sectionextending from one end of the frame to the other.

It very often happens that thesecylinders are out of balance andarefheavier on, one side than the other, and this results in vibrationwhile4 roe tating, rapid wearing Aof bearings, and other defectiveresults. Heretofore, it has been customary to endeavor tostaticallybalance vthese cylinder sections `by placing them on suitable bearingsat each end thereof, and determine as to where the heavy spots or light`spots in the pee riphery `ol? the cylinders might be. 'Due to lthe'Vlengthof these cylinder sections, if it were .bal-

. vthevcylinder section; Y Y

(otra-6c) e these shafts are vmounted inA laterally slidable n ,rollerbearingsnand one of these shafts is connectedto adriving means by meansof a special type of universal joint, so that rotation can be impartedtothe cylinder sectionl while it isr mounted in the specialbearings,` sothat the rotation ofthe cylinder can be reflected in lateral lvibrationofthe cylinder together with a gauge or marking meansy rfor indicatingonrthe shaft where the light points are inthe periphery of ,eachendofthe cylinder section. i g

Some ofthe objects ofthe invention having been stated, other objectswill appear asrthe description i proceeds, Ywhen taken in connectionwith the accompanying drawings, lin which-f Figure 1` is asideelevation, with partspbroken away,vshowing a' preferred4 embodimentof myv invention; A y Y.

Figure52 is a top plan view of theright-hand portion ofFigurell; l A

Figure 3"is a longitudinalsectional view of the universal jointmechanisms,vshown in elevation at-the left-hand end of Figure 1;

Figure 4 is an enlarged detail view of` one of the universal joints,showing part of the .same

insectiony f l f Figure 51s an elevational View taken along the vline5-5 in Figure 2, and showingy one end of the appaatusiv fl l i A vVFigure 6 is averticalsectional viewtaken along the line 6 6 in Figure,5; g e

Figure '7-is anfend elevation of one' ofthe heads, or disc members whichI ax to each endof Figure A8 is a view partly-in longitudinal sectionand partly in elevationfand taken substantially along the line 8-8 inFigure 2.

Referringmore specically to the drawings, the numeral IULindicates abase'platefor a, pair of trackways, said trackways being Vcompleted by apairrofangle' members *IIv and I2, which have Itis an object of. thisinvention tolprovide means for dynamically balancing ,these sections ofcylinders while theyarerotating and bale ancing, Joneat a time, theopposed ends vofia section ofa cylinder, so that it can be lluly balv IK y f f slots Ity and havejtheirjlower headedportions i vide anapparatus wherein a cylinderl section has a special head member securedatl each fend "thereof, having Va shaft eirtending therefrom,

their' contiguous Yedges vspaced apart from each other providing "slotsYI 3.' VIt is on these trackways that a pair of bearing members areadapted to be e'idjustablyV mounted."- These bearing members compriseabase portion I 4 having a p air of wheels land` I6 at eachendithereofwhichare adapted to run onthe angle members I l. Slidably penetrartingeach end of the base portion; I4 are two bolts I'I which slidably andloosely penetrate the disposed below thelslots I 3 with a suitablewasher Y Zlldisposed therearound to prevent thejbolt heads the bolts l1,so that when the bearing member has been adjusted to the right positionalong the trackway, the nuts 22 can be tightened to hold the bearing inadjusted position. The bearing has a pair of upstanding legs 25 and 26,and the upper portion of the base member I4 has on that portion disposedbetween the upstanding portions 25 and 28, a plate 21 which has theupper ends of bolts 28 and 29 loosely fitting therein, said bolts beingthreadably securedin the portion I4, so that by adjusting the bolts 28and 29,

the portion 21 can be leveled. This portion 21 has a pair of ribs 30 and3l projecting from its upper surface, and a pair of raceways 32 and 33"in which suitable balls are mounted. Slidably mounted on the portion 21is a block 35`having a notch 36 therein, and between the side walls ofthe block 35, there is rotatably mounted rollers 31 and 38 which arerotatably mounted on shafts 39 and 48. Secured on one of the posts 25and 26l is'a'block 41` having a pair of' notches 42 and 43 'therein inwhich a pencil 44 is adapted to be positioned for purposes to `be-laterdescribed.

Adapted to rest on therollers 31 and 38 in the right-hand bearing memberas shown in Figure 1 is a shaft 50 which has xedlyrsecured thereon adisc l having-'a plurality ofthreaded bolts 52 securedr therein vandprojecting outwardly. The shaft 50 is secured to the disc 5lfby anysuitable means such as aset-screw 53. The threaded bolts 52 haveheads54'thereon, and suitable'nuts 55 confine the bolts on thehead ordisc 5l. The shaft 58 extends further inwardly into the cylinder 58 andpenetrates a hub portion of arheader disc 56 Awhichis a conventionalpart of `the cylindersection 58and the hub kportion 56 is secured to theshaft 50 by any suitable meanssuch as a set screw 51. The cylinder 58 ateachend has a flange portion 59, which flanges t against like flanges onthe next adjoining section of the cylinder when the sections of, the.cylinders are joinedtogether to `make one integral driving. cylinderthroughouta textile frame. The bearing member at the left-hand end ofthe cylinder, as shown in Figure 1, is identical to the. one shown anddescribed at the right-hand end, and like references. willapplir exceptthat the shaft. instead of being designated 50 isdeslgnated as 58a. Thecylinder 58 at each end has holes 4.8 and 49 through which a wrench mayvbe inserted for turning set screws 51. This shaft 58d has a cavity intheleft-hand thereof `in Figure 1 in which a connecting rod 60 is securedby any suitable means such as a set screw 6I, and a member 62 issecuredV by means of set screw 63 to the. lefthand end `of connectingrod 68 in Figure 1. This member 62'isnbretter illustratedin Figure 4,4except that the showing in Figure 4 is in reversed position. The member62 has a cavity 65 therein with apair of Yslots 66 and 61 in which a pin68 is loosely mounted, said pin penetrating a ball 69 on one end ofV amember 18, and threadably mounted on member 62 is a cylindrical member'H which is secured in adjusted position by means of a set screw 'l2'.stricted end by means of an inturned vflange 13l for confining the ball69 imposition. This gives entirely free and unlimited movement in'onedi-A rection except that it is limited by theV flange 13,

and limited movement in the other direction which is limited by theamount of movement pin` 68 can have vin the slots 66 and 61.

The portion penetrates va cavityin a connecting link 80, and is Secliredin position by means of a set screw 8l, and'in the .other end of thisconnecting rod 80, there is secured by vin a suitable bearing post 81and is driven by `any suitable means such as a pulley 88 having a Thismember 1I has a re- 2 belt, not shown, from a suitable prime movervmounted thereon.

In balancing a cylinder section, the heads 5l with the threaded boltsprojecting therefrom are secured in position on each end of the cylindersection, and it is rotated from 800 to 2,000 R. P. M.s, the preferablespeed usually being around 1100 R. P. M. Previously to this, the pencil'is placed Ain one of the notches 42 or 43 with its point not quitetouching the shaft. While the section with the heads thereonis rotatingat a speed above the critical speed, the pencil is grad ually movedtowards the shaft until the shaft touches the pencil; After the shafthas touched thepencil probably from 100 to 200 times, or once for eachrevolution, the cylinder is then stopped. Then the pencil is moved overinto the other notch, and then the cylinder is rotated in the otherdirection, and the pencil is moved up until it can be felt that theshaft is touching the pincil. The cylinder is then stopped, and it isnoted whererthe two pencil marks are on the shaft; while the cylinder isrunning in af counter-clockwise manner in Figure 2, mark A will be made,and when` it is then reversed and runs in a clockwise direction inFigure 2, the mark B will bemacle b-y the pencil on the shaft. Thesemarks are usually no longer in length than three-fourths of an inch.Thenthe half-way point between the outer ends of the pencil marks willbe the point at'which the cylinder` is off balance, or this spotrepresents the light point in the cylinder. Suitable nuts are sleevesmade of solder are then screwed onto the bolts 52 at the point where themarks A and B indicate the light point on the cylinder. Suitable nutsmade of solder are threaded onto the bolts until it is found that, withagven weight of one or more of these nuts made of solder effected eitherby interchanging the nuts of solder or by adding more than one nut, thepencil, while the -cylinder is rotating in either direction, leaves acontinuous vcircumferentially disposed mark on the shaft. Then thesenuts made of solder, whether it.be one nut or more thanfone, arevtransferred bodily to the inside of the cylinder through the hole to apoint on the interior of the cylinder represented by the point mid--way'of. the ends of the pencil marks A1 and B, and they are melted anddeposited asf solder onto the interior of the cylinder.. This operationis then repeated on the other end of the cylinder to balance the otherend. When this is done, the balancing is checked at each end as.above-described at about 2,000 R.. P. M.s, and ofcourse, if there shouldbe any off balance indicated, the process above-described would berepeated, ,butV it usuallyshows a continuous pencil mark'all the wayaround the shaft which indicates that the cylinder is dynamicallybalanced. These tubes of. solder 90' have a hole therethrough ofslightly smaller dimensions than the dimensions of the bolts 52, and'different lengths of solder tube are selected for screwing onto thebolts until one of suitable length has been found to dynamically balancethe ends of the cylinder being tested.

Static balancing is practical on an object hav, ing very shortlongitudinal dimensions such as automobile wheels, heavy pulleys, or thelike, but in an elongated object like a cylinder for spinning andtwisting frames, spoolers, quillers, and the like, static balancing isnot practical on accountr of the longitudinal length of the cylinders.

In the drawings and specification there has been set forth a preferredembodiment of the invention, and although specific terms are employed,they are used in a generic and descriptive sense only, and not forpurposes of limitation, the

scope of the invention being defined in the claims.

1. Apparatus for dynamically balancing cylinders and other elongatedobjects which comprises a trackway, a pair of laterally slidable bearingmembers adjustably mounted along the trackway, a pair of head memberseach having a shaft fixedly secured therein and extending from eachsurface of the head members, each of said head members having aplurality of threaded bolt members extending outwardly therefrom, theshafts being adapted to be secured to the end portions of the cylinders,the other projecting portions of said shafts being adapted to besupported by said 'bearing members disposed on the trackway, a universaljoint arrangement connected to the outer end of one'of the shafts andhaving power driven means associated therewith for imparting rotation tothe shaft and to the cylinder sections supported by the shafts, meansfor supporting a marking member for placing a a spinning frame, twistingframe, spooler, quiller, and the like, comprising a pair of circularhead members each having a shaft projecting from each side thereof, thecylinder sections having hub members therein adapted to receive one endof each of said shafts, each of said circular head Amembers having aplurality of threaded bolts extending outwardly therefrom for receivingweighted members for dynamically balancing the shafts, a pair of bearingstands adapted to rotatably receive the outwardly projecting ends ofsaid shaft, each of said bearing stands having a laterally slidablebearing portion whereby vibration in the cylinder section while rotatingwill allow the laterally slidable bearing portions to move laterally ofthe bearing members, each of the bearing stands having a support forsupporting a marking member to mark on the shaft an indication when thecylinder section and shafts are rotating in one direction, and alsohaving a supporting portion for supporting a marking member for markingon the shaft at another position a marking when the cylinder is rotatingin an opposite direction whereby the point of unbalance in the cylindersection may be determined by\rotating the same in opposite directions.

ROBERT B. JENKINS.

